This is a series of night photographs taken with nothing but available light. Most of these had no moonlight present and the foregrounds are lit only by moonlight and airglow. Each of these is a single exposure and not a composite image usually used to blend in longer exposures used on the foreground.
Taking single exposure images that combine pinpoint stars in the sky and properly exposed foregrounds requires a camera with exceptional high ISO performance. Most, if not all, are taken with the Sony A7S.